FACULTY OF ARTS & DESIGN Research paper
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Item Antibacterial functionalization of reactive-cellulosic prints via inclusion of bioactive Neem oil/beta CD complex(ELSEVIER SCI LTD, 2011) Ibrahim, N. A.; Eid, B. M.; El-Zairy, E. R.In the present research enhancing the antibacterial activity of cellulosic fabrics printed with reactive dyes was achieved through combined reactive printing and beta CD loading in one step followed by subsequent treatment with Neem oil, as an eco-friendly antimicrobial agent. Retention of Neem oil with its main compound azadirachtin within the hydrophobic cavities of beta CD moieties-attached the reactive cellulosic prints, via formation of host-guest inclusion complexes, to impart antibacterial functionality against G+ve (Staphylococcus aureus) and G-ve (Escherichia coli) bacteria was carried out. The experimental results reveal that post-treatment with Neem oil results in a remarkable improvement in the antibacterial activity of the treated reactive prints along with darker depth of shade and without adversely affecting the UV-blocking properties of the final products. Mode of interactions, surface morphology as well as washing durability of antibacterial and anti-UV functions were also investigated. (C) 2011 Elsevier Ltd. All rights reserved.Item A cleaner production of ultra-violet shielding wool prints(ELSEVIER SCI LTD, 2015) Ibrahim, N. A.; Khalil, H. M.; Eid, B. M.There is an urgent need to reduce the environmental impacts of textile wet processes taking in consideration product and environmental quality as well as economic concerns. Substitution of hazardous chemicals at the source and/or shortening the production steps are potential options which could be used to move towards cleaner production process and to cope with ever-increasing demands for eco-friendly textile products. In this research the possibility of enhancing both the ultra-violet shielding and coloration properties of wool fabric in a single-stage using beta-cyclodextrin or monochlorotriazinyl beta-cyclodextrin as well as certain ultra violet absorbers or blockers as additives to other environmentally benign printing paste components was investigated. The modified one-step coloration and functionalization method, using safer textile auxiliaries, less energy, and water consumption, proved to have positive impacts on the depth of the obtained prints and their fastness properties as well as on their ability to shield the harmful ultra-violet B-radiation without seriously affecting the environment. The enhancement in the imparted properties is governed by type of cydodextrin, degree of fixation onto/ within the wool structure, type and extent of immobilization of the used ultra violet protector, type of dye and its mode of interaction, as well as degree of interactions among the nominated printing paste components and the wool active sites during the steam fixation step. The imparted ultra-violet protection properties to the modified wool prints show obviously improved durability to wash compared to the unmodified ones. (C) 2014 Elsevier Ltd. All rights reserved.Item Eco-friendly modification and antibacterial functionalization of viscose fabric(TAYLOR & FRANCIS LTD, 2017) Eid, B. M; El-Zairy, E. M. R.; Ibrahim, N. A.Pretreatment of viscose fabric with monochlorotraizinyl -cyclodextrin (MCT-CD), as an eco-friendly modifying agent, is accompanied by creation of hosting nanocavities onto the cellulose structure thereby enabling inclusion of certain antibacterial agents namely triclosan, as a classic agent, and AgNO3, as well as bioactive agents like green tea extract and Aloe vera gel. The efficiency of hosting the nominated antibacterial agents to confer antibacterial functionality is governed by the type of modification method and follows the decreasing order: exhaustion>pad-steam fixation>pad-dry-cure. The imparted antibacterial functionality of MCT-CD-loaded fabric samples is determined by type of the hosted antibacterial agent into cavities of CD and follows the decreasing order: AgNO3>green tea extract>triclosan>Aloe vera gel. Nitrogen content analysis, FTIR spectra, SEM image and EDX spectrum of Ag-loaded fabric sample confirmed the impact of suggested treatment sequence on the chemical and surface properties of the functionalized viscose fabric. The results also demonstrate that the imparted antibacterial activity against S. aureus (G+ve) and E. coli (G-ve) bacteria slightly decreased after 15 washing cycles.Item Environmentally sound approach for imparting antibacterial and UV-protection functionalities to linen cellulose using ascorbic acid(Elsevier, 8/15/2019) Barakat, Soliman; Emam, Elamir; El-Zairy, Enas M; Eid, Basma M; Ibrahim, Nabil AIn this work, multifunctional linen cellulose fabrics were facilely developed by using an eco-friendly finishing formulations and the pad-dry/microwave fixation technique. Both reactant resin and citric acid have been employed as low- and zero-formaldehyde crosslinkers along with their proper catalyzing agents. Individual incorporation of ascorbic acid and selected phenolic compounds namely salicylic acid, resorcinol, and gallic acid, as natural active ingredient (AI-OH) along with PEG-400 or modified nonionic silicone-softener in ether- or ester-crosslinking formulation and their impacts on the performance, functional properties and degree of coloration of the finished fabrics were investigated. FTIR, SEM, and EDX analysis of selected samples were carried out. Results revealed that type of crosslinker, kind and concentration of active ingredient, as well as type of additive play an important role in the imparted functional properties. The durability of the imparted antibacterial and UV protection functional properties was confirmed by washing test. (C) 2019 Elsevier B.V. All rights reserved.